Gas turbomachinery generator

1. A gas turbomachinery electricity generation apparatus comprising:

a gas turbomachinery arrangement;

a rotary drive take-off associated with said gas turbomachinery arrangement;

an electricity generating arrangement comprising a first generator stage including a first generator rotor and generator stator arrangement and a second generator stage including a second generator rotor and generator stator arrangement; and

wherein at least one of said first and second generator rotors is driven by said rotary drive take-off; and

wherein said gas turbomachinery arrangement includes a rotary compressor stage including a rotary impeller stage.

2. A gas turbomachinery electricity generation apparatus as set forth in claim 1 wherein said gas turbomachinery arrangement includes at least one gas driven turbine stage.

3. A gas turbomachinery electricity generation apparatus as set forth in claim 2 wherein said rotary drive take-off is associated with said at least one gas driven turbine stage.

4. A gas turbomachinery electricity generation apparatus as set forth in claim 1 wherein said gas turbomachinery arrangement includes a gas compressor stage.

5. A gas turbomachinery electricity generation apparatus comprising:

a gas turbomachinery arrangement;

a rotary drive take-off associated with said gas turbomachinery arrangement;

an electricity generating arrangement comprising a first generator stage including a first generator rotor and generator stator arrangement and a second generator stage including a second generator rotor and generator stator arrangement; and

wherein at least one of said first and second generator rotors is driven by said rotary drive take-off; and

wherein said gas turbomachinery arrangement includes a common shaft, a gas compressor stage having a rotary impeller mounted on said common shaft, and a gas turbine stage having a turbine rotor mounted on said common shaft.

6. A gas turbomachinery electricity generation apparatus as set forth in claim 5 wherein said first and second generator stages of said electricity generation arrangement being directly driven by said common shaft.

7. A gas turbomachinery electricity generation apparatus as set forth in claim 6 wherein said first and second generator stages of said electricity generation arrangement are arranged in series.

8. A gas turbomachinery electricity generation apparatus as set forth in claim 6 wherein said first and second generator stages of said electricity generation arrangement are mounted on said common shaft.

9. A gas turbomachinery electricity generation apparatus comprising:

a gas turbomachinery arrangement comprising a gas compressor stage having a rotary impeller and a gas turbine stage;

a rotary drive take-off associated with said gas turbomachinery arrangement;

an electricity generating arrangement comprising a first generator stage including a first generator rotor and a generator stator arrangement, a second generator stage including a second generator rotor and a generator stator arrangement, a first shaft, and a second shaft separate from said first shaft, said first generator stage being mounted on said first shaft and said second generator stage being mounted on said second shaft; and

wherein at least one of said first and second generator rotors is driven by said rotary drive take-off.

10. A gas turbomachinery electricity generation apparatus as set forth in claim 9 wherein said first and second rotor stages of said generation arrangement are drivingly associated with one or other of compressor impeller and the (or a) turbine rotor.

11. A gas turbomachinery electricity generation apparatus as set forth in claim 9 including either one of a gear means and clutch means to couple said first shaft and said second shaft together.

12. A gas turbomachinery electricity generation apparatus comprising:

a gas turbomachinery arrangement;

a rotary drive take-off associated with said gas turbomachinery arrangement;

an electricity generating arrangement comprising a first generator stage including a first generator rotor and generator stator arrangement and a second generator stage including a second generator rotor and generator stator arrangement; and

wherein at least one of said first and second generator rotors is driven by said rotary drive take-off; and

wherein said gas turbomachinery arrangement includes at least one gas driven turbine stage and a gas compressor stage, said gas compressor stage being mounted on or connected to a take-off shaft of said at least one gas driven turbine stage.

13. A gas turbomachinery electricity generation apparatus as set forth in claim 12 wherein said gas turbomachinery arrangement includes a combustion stage for combustion of a gas/fuel mixture.

14. A gas turbomachinery electricity generation apparatus as set forth in claim 13 wherein said combustion stage is provided intermediate said gas compressor stage and said at least one gas driven turbine stage.

15. A gas turbomachinery electricity generation apparatus as set forth in claim 13 wherein said gas turbomachinery arrangement is arranged to burn a gas fuel or a liquid fuel at said combustion stage.

16. A gas turbomachinery electricity generation apparatus comprising:

a gas turbomachinery arrangement;

a rotary drive take-off associated with said gas turbomachinery arrangement;

an electricity generating arrangement comprising a first generator stage including a first generator rotor and generator stator arrangement and a second generator stage including a second generator rotor and generator stator arrangement; and

wherein at least one of said first and second generator rotors is driven by said rotary drive take-off;

wherein said gas turbomachinery arrangement includes a combustion stage for combustion of a gas/fuel mixture; and

wherein said combustion stage comprises a combustion chamber in which a working gas is heated by combustion of the fuel, which is then passed to a downstream turbine.

17. A gas turbomachinery electricity generation apparatus as set forth in claim 16 wherein a power rating ratio between said first and second generator stages is substantially in a range of 1:1.5 to 1:9.

18. A gas turbomachinery electricity generation apparatus as set forth in claim 17 wherein the power rating ratio between said first and second generator stages is substantially in the range of 1:2 to 1:4.

19. A gas turbo machinery electricity generation apparatus as set forth in claim 1 wherein at least one of said first and second generator rotors is arranged to be driven to initiate rotational operation of said gas turbomachinery arrangement.

20. A gas turbomachinery electricity generation apparatus as set forth in claim 1 including a means for operating at least one of said first and second generator stages in a motor mode.

21. A gas turbomachinery electricity generation apparatus as set forth in claim 20 including a control system means for operating at least one of said first and second generator stages in a motor mode.

22. A gas turbomachinery electricity generation apparatus as set forth in claim 21 wherein said control system includes an inverter means for power supply to at least one of said first and second generator stages.

23. A gas turbomachinery electricity generation apparatus as set forth in claim 22 wherein said inverter means is arranged to charge/maintain a start-up power supply battery.

24. A gas turbomachinery electricity generation apparatus as set forth in claim 20 wherein a lower power rated stage rotor is arranged to be driven to initiate rotational operation of said gas turbomachinery arrangement.

25. A gas turbomachinery electricity generation apparatus as set forth in claim 21 wherein said control system is capable of selecting electrical power to be supplied by at least one of said first and second generator stages dependent upon the output requirement of said apparatus.

26. A gas turbomachinery electricity generation apparatus comprising:

a gas turbomachinery arrangement;

a rotary drive take-off associated with said gas turbomachinery arrangement;

an electricity generating arrangement comprising a first generator stage including a first generator rotor and generator stator arrangement and a second generator stage including a second generator rotor and generator stator arrangement; and

wherein at least one of said first and second generator rotors is driven by said rotary drive take-off;

wherein said gas turbomachinery arrangement includes a combustion stage for combustion of a gas/fuel mixture;

wherein said gas turbomachinery arrangement is arranged to burn a gas fuel or a liquid fuel at said combustion stage; and

wherein said gas turbomachinery arrangement includes at least one gas driven turbine stage, a gas compressor stage, and recuperator means for preheating the air by heat from the exhaust of the gas turbine before the air passes to the combustion chamber or chambers.

27. A gas turbomachinery electricity generation apparatus comprising:

a gas turbomachinery arrangement;

a rotary drive take-off associated with said gas turbomachinery arrangement;

an electricity generating arrangement comprising a first generator stage including a first generator rotor and generator stator arrangement and a second generator stage including a second generator rotor and generator stator arrangement; and

wherein at least one of said first and second generator rotors is driven by said rotary drive take-off; and

wherein said gas turbomachinery arrangement has a compressor stage and a turbine stage and said first and second generator rotors are coupled together on a common axis to form a single line.

28. A gas turbomachinery electricity generation apparatus as set forth in claim 27 wherein said single line includes means for permitting an axial length of the single line adjusting itself automatically to the demands of differential expansion between the single line and stationary parts.

29. A gas turbomachinery electricity generation apparatus comprising:

a gas turbomachinery arrangement;

a rotary drive take-off associated with said gas turbomachinery arrangement;

an electricity generating arrangement comprising a first generator stage including a first generator rotor and generator stator arrangement and a second generator stage including a second generator rotor and generator stator arrangement; and

wherein at least one of said first and second generator rotors is driven by said rotary drive take-off; and

wherein said gas turbomachinery arrangement includes at least one gas driven turbine and a gas compressor stage coupled together on a common axis on a first line, and on a second line on a common axis the rotor of said second generator stage coupled together with a turbine stage driven by an appropriate fraction of products of combustion taken from said gas turbomachinery arrangement of the first line.

30. A gas turbomachinery electricity generation apparatus comprising:

a gas turbomachinery arrangement;

a rotary drive take-off associated with said gas turbomachinery arrangement;

an electricity generating arrangement comprising a first generator stage including a first generator rotor and generator stator arrangement and a second generator stage including a second generator rotor and generator stator arrangement; and

wherein at least one of said first and second generator rotors is driven by said rotary drive take-off; and

wherein a respective rotor of the generator arrangement includes an airway extending generally in the direction of the rotor axis permitting cooling air or other gas to be drawn along the rotor.